Attaches an ENI to a VPC-connected instance.

Description

  • The ENI must be in the Available state.
  • The instance must be in the Running or Stopped state.
  • An ENI can only be attached to a VPC-connected ECS instance, and the ENI must belong to the same VPC as the ECS instance.
  • One ENI can only be attached to one instance.
  • An instance can be attached with multiple ENIs. For more information about the maximum number of ENIs that can be attached to each instance type, see Elastic network Interface.
  • Because a VSwitch of a VPC can only be located in a single zone, ensure that the ECS instance to be attached to an ENI is in the same zone as the VSwitch that hosts the ENI.

Debugging

You can use API Explorer to perform debugging. API Explorer allows you to perform various operations to simplify API usage. For example, you can call APIs, dynamically generate SDK example code, and quickly retrieve APIs.

Request parameters

Name Type Required Example Description
InstanceId String Yes i-myInstance

The ID of the instance.

NetworkInterfaceId String Yes [networkInterfaceId]

The ID of the ENI.

RegionId String Yes cn-hangzhou

The ID of the region where the ECS instance resides. You can call DescribeRegions to view the latest regions of Alibaba Cloud.

Action String No AttachNetworkInterface

The operation that you want to perform. Set the value to AttachNetworkInterface.

Response parameters

Name Type Example Description
RequestId String 473469C7-AA6F-4DC5-B3DB-A3DC0DE3C83E

The ID of the request.

Examples

Sample requests

https://ecs.aliyuncs.com/?Action=AttachNetworkInterface
&InstanceId=i-myInstance
&NetworkInterfaceId=[networkInterfaceId]
&RegionId=cn-hangzhou 
&<Common request parameters>

Successful response examples

XML format

<AttachNetworkInterfaceResponse>
  <RequestId>04F0F334-1335-436C-A1D7-6C044FExxxxx</RequestId>
</AttachNetworkInterfaceResponse>

JSON format

{
	"RequestId":"04F0F334-1335-436C-A1D7-6C044FExxxxx"
}

Error codes

HTTP status code Error code Error message Description
403 InvalidUserType.NotSupported %s The error message returned when your account type is not supported.
403 Abs.InvalidAccount.NotFound %s The error message returned when the specified Alibaba Cloud account does not exist or your AccessKey has expired.
400 MissingParameter %s The error message returned when a required parameter is not specified.
403 Forbidden.NotSupportRAM %s The error message returned when RAM users are not allowed to perform this operation.
400 UnsupportedParameter %s The error message returned when a parameter is not supported.
403 Forbidden.SubUser %s The error message returned when a RAM user is unauthorized to perform operations on this resource.
400 InvalidParameter %s The error message returned when the parameter format is invalid.
400 InvalidInstanceId.MalFormed %s The error message returned when the instance ID format is invalid.
400 InvalidOperation.InvalidRegion %s The error message returned when the specified region ID is invalid.
400 InvalidOperation.InvalidEcsState %s The error message returned when the private IP address cannot be released under the instance state.
400 InvalidOperation.InvalidEniState %s The error message returned when the private IP address cannot be released under the ENI state.
400 InvalidOperation.DetachPrimaryEniNotAllowed %s The error message returned when the primary ENI cannot be detached from its instance.
404 InvalidEcsId.NotFound %s The error message returned when the specified instance ID does not exist.
404 InvalidEniId.NotFound %s The error message returned when the specified ENI ID does not exist.
404 InvalidVSwitchId.NotFound %s The error message returned when the specified VSwitch ID does not exist.
404 InvalidSecurityGroupId.NotFound %s The error message returned when the specified security group ID does not exist.
403 EniPerInstanceLimitExceeded %s The error message returned when the number of ENIs exceeds the upper limit for the specified instance type.
403 InvalidOperation.AvailabilityZoneMismatch %s The error message returned when the specified VSwitch, ENI, and instance do not belong to the same zone.
403 InvalidOperation.VpcMismatch %s The error message returned when the specified ENI and security group do not belong to the same VPC.
403 SecurityGroupInstanceLimitExceed %s The error message returned when the number of instances in the specified security group exceeds the upper limit.
403 InvalidSecurityGroupId.NotVpc %s The error message returned when the specified security group is not VPC-connected.
403 InvalidOperation.InvalidEniType %s The error message returned when the ENI type is not supported.
400 Forbidden.RegionId %s The error message returned when this function is not supported in the region.
403 InvalidInstanceId.NotFound %s The error message returned when the specified instance does not exist.
400 InvalidOperation.InvalidGeneration %s The error message returned when the instance type is not supported.

View error codes